KR101041786B1 - Actuator for lumbar support device - Google Patents

Abstract

The present invention relates to a lumber support actuator, and an embodiment of the present invention has a space portion therein and has a towing wire entrance and exit portion connected to the space portion on one side, and covers a base housing and a base housing fixed inside the car seat. The pulley is rotatably mounted on the space of the housing and the base housing, and the upper part has a splined protrusion inserted into the outer circumferential surface, and one end is coupled to the lower side of the base housing and the other end protrudes to the outside of the car seat. The drive unit penetrates and integrally rotatably coupled to the shaft, the ratchet gear installed on the outside of the drive unit to surround the drive unit, and meshes with a latching member installed on one side of the drive unit, and rotates in conjunction with the rotation of the ratchet gear. Spline grooves corresponding to the spline protrusion is formed is coupled to the insertion portion It comprises a hub and provides Lumber supporter actuator takes the pulley rotates winding a tow wire by rotation of the Shaft.

Lumber Support, Actuator, Pulley, Drive, Ratchet Gear, Spline Groove, Hub

Description

Lumber Support Actuator {ACTUATOR FOR LUMBAR SUPPORT DEVICE}

The present invention relates to an actuator for operating a lumber supporter, and more particularly, to wind or unwind a traction wire connected to a lumber supporter so that a user can arbitrarily adjust the state of the lumber supporter provided inside the car seat for a more comfortable riding posture. It relates to a lumber support actuator acting.

Typically, a lumber support device is installed inside the car seat back to support the waist of the passenger, and the passenger operates the actuator provided at one side of the car seat to operate the lumber supporter. Changes to an optimal state.

For example, as disclosed in the Patent Registration Publication of the United States Patent Office (Registration No. 5,911,477), it can be configured to adjust the position and state of the lumber supporter provided inside the seat back according to the arbitrary number of passengers sitting on the seat. have.

1 is a view for explaining the structure of the lumber supporter provided in the conventional seat, the exterior of the seat 10 formed by the seat cushion 12 and the seat back 14 feels soft when the passenger is seated. It is generally formed of a soft material or synthetic resin so that the interior of the seat cushion 12 and the seat back 14 is provided with a metal frame to sufficiently withstand the load transmitted from the passenger, between each frame In addition to the load of the passenger is provided with a variety of elastic means for cushioning when the shock is transmitted from the outside.

In addition, as shown in the figure, a lumber supporter is formed to adjust the position of the waist support 20 provided in the seat back 14 according to the physical condition of the passenger. In addition to the frame (not shown) of the seat back, the lumber supporter is formed with a guide wire 22 on the front rear side of the seat back where the back of the passenger touches, and the guide wire 22 has a triangular shape which is lifted by a user's operation. The upper bracket 24 shows the assembled structure. A lower bracket 26 having a shape corresponding to the upper bracket 24 is formed in a triangular shape at the lower side of the guide wire 22, and a user's operation force can be transmitted between the upper bracket 24 and the lower bracket 26. The core wire 28a of the traction wire 28 is connected so that it may be connected.

In addition, a pair of tension wires 30 are formed on the front side of the guide wire 22 to vary the degree of bending according to the position movement amount of the upper bracket 24 described above, and a plurality of supports are provided between the tension wires 30 positioned at both sides. The wire 32 has a structure arranged at predetermined intervals.

On the other hand, an actuator 28b is formed on one side of the seat 10 to receive a user's operating force, and the other end of the towing wire 28 connected to one end of the seat 10 is fixed to the upper bracket 24. The core wire 28a is connected. Therefore, when the user operates the actuator 28b in any one direction, the operation force is transmitted to the upper bracket 24 through the towing wire 28 connected to the regulator, so that the lifting operation of the upper bracket 24 is made. As the shape of the tension wire 30 fixed to the upper end is fixed to the upper bracket 24, the degree of bending toward the front is changed, the degree of curvature of the lumber supporter according to the physical condition of the passenger is adjusted.

At this time, the actuator adjusts the degree of curvature of the lumber supporter by pulling or releasing the towing wire connected to the lumber supporter. The actuator should be able to finely adjust the degree of curvature. Should be able to remain robust.

In addition, the actuator needs to be easy to assemble the various parts are assembled and completed, it is necessary to reduce the number of parts in order to reduce the production cost by mass production to reduce the manufacturing cost and labor.

The present invention relates to a lumber supporter actuator that is easy to assemble and has an effect of reducing labor and manufacturing cost. One embodiment of the present invention has a space portion therein and a traction wire entrance is provided to communicate with the space portion at one side thereof. A base housing fixed inside the car seat, a cover housing covering the base housing, a pulley rotatably mounted on the space portion of the base housing, and an upper portion of the base housing having a splined protrusion formed on the outer circumference thereof, and one end coupled to the lower side of the base housing. And the other end of the shaft protruding out of the car seat, the drive unit penetrating rotatably coupled with the shaft through the pulley, the ratchet is installed on the outer side of the drive unit to surround the drive unit, the ratchet is fitted to the engaging member installed on one side of the drive unit It rotates in conjunction with the rotation of gears and ratchet gears, The spline grooves corresponding to the projections are formed includes a hub coupled to the insertion portion, and is associated with an actuator which takes Lumber supporter to rotate the pulley winding a tow wire by rotation of the Shaft.

One embodiment of the present invention has a space portion therein, the one side is provided with a traction wire entrance to communicate with the space portion, the base housing fixed inside the car seat, the cover housing covering the base housing, rotatable in the space of the base housing And a pulley having a splined protrusion inserted into an outer circumferential surface on the upper side thereof, one end of which is coupled to the lower side of the base housing, and the other end of which is rotatably integrated with the shaft through a shaft and a pulley protruding out of the car seat. Drive unit to be coupled, the ratchet gear is installed on the outer side of the drive unit to surround the drive unit, the ratchet gear is fitted to the engaging member installed on one side of the drive unit, and the spline groove corresponding to the spline protrusion is rotated in rotation in conjunction with the rotation of the ratchet gear is formed A hub coupled to the insert, the pulley being driven by rotation of the shaft Provided is a lumber support actuator that rotates to wind the traction wire.

According to a preferred embodiment of the present invention, a stopper protrudes from one side of the inner side wall of the base housing so that the pulley does not rotate more than a predetermined angle.

According to a preferred embodiment of the present invention, the driving portion, a protrusion through which the pulley is integrally coupled with the shaft is formed at the lower end, the head is extended on the upper end, the support is protruded in the center of the head, the support One side of the engaging projection is provided with a engaging member is coupled, the fan-shaped rotating portion is formed extending from the support portion to the outside, the end of the rotating portion is formed by the locking step is bent downward.

According to one preferred embodiment of the present invention, a stepped protrusion is formed on the bottom of the cover housing so that the rotating part does not rotate more than a predetermined angle.

According to a preferred embodiment of the present invention, the engaging member is made of a pair of engaging pieces facing each other, the engaging piece is one end hinged to the engaging projection and the other end is elastically supported to the outside, a pair of engaging pieces One of which is selectively engaged with the ratchet gear.

According to a preferred embodiment of the present invention, a tooth is formed at the upper end of the inner circumferential surface of the ratchet gear so that the engaging member is engaged, and the lower end of the ratchet gear has a plurality of cutout grooves formed along the edge thereof.

According to a preferred embodiment of the present invention, it further comprises a ring fixed to one side of the space portion of the housing to surround the hub, a plurality of cam-shaped convex is formed on the outer circumferential surface of the hub, each of the plurality of rollers in the cutting groove The inner peripheral surface of the ring and the outer peripheral surface of the hub is inserted so as to be pressed, so that the hub rotates integrally with the ratchet gear by the rotation of the ratchet gear.

According to a preferred embodiment of the present invention, the cutting groove is provided with a rigid roller, one on each side of one elastic roller.

According to a preferred embodiment of the present invention, it is installed in a circular shape on the outside of the ratchet gear to surround the ratchet gear, both ends of the engaging projection is formed so as to be caught on both sides of the locking jaw of the drive, the rotating part in the rotation of the drive in one direction An elastic spring may further include a return spring.

According to a preferred embodiment of the present invention, a seating groove in which a return spring is seated is formed along an inner wall of the base housing, and a support jaw is protruded from one side of the seating recess, and a catching portion of the return spring is provided at both sides of the support jaw. Each is supported.

Lumber support actuator according to an embodiment of the present invention is excellent in operability and reliability, easy to assemble, there is an effect of reducing the labor and manufacturing cost according to the number of parts.

In addition, the size of the product can be minimized by designing the ratchet structure inward to cope with the recent trend of thinning the back frame of the automobile seat.

Hereinafter, a preferred embodiment of a lumber support actuator according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following examples are not intended to limit the scope of the present invention but merely illustrative of the components set forth in the claims of the present invention, which are included in the technical spirit throughout the specification of the present invention and constitute the claims Embodiments that include a substitutable component as an equivalent in the element may be included in the scope of the present invention.

Example

1 is a schematic view showing a structure of a conventional lumber supporter, FIG. 2 is a schematic view showing a lumber support actuator connected to a lumber supporter according to one embodiment of the present invention, and FIG. 3 is a lumber supporter according to an embodiment of the present invention. 4 is an exploded perspective view of FIG. 3, FIG. 5 is a sectional view of FIG. 3, FIG. 6 is a perspective view showing a state in which the cover housing is removed from FIG. 3, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is FIG. 7. 9 is a perspective view of a base housing according to an embodiment of the present invention, and FIG. 10 is a perspective view of a cover housing according to an embodiment of the present invention.

As shown in Figure 2, the lumber supporter (L) is installed inside the car seat, the lumber supporter actuator 100 is installed on one side of the car seat to operate the lumber supporter (L), such a lumber supporter (L) ) Can be operated in the best state by adjusting the degree of bending of the lumber supporter (L) by pulling or releasing the towing wire (W) connected to one side of the lumber supporter (L).

At this time, as shown in Figures 3 to 5, the lumber support actuator (hereinafter, 'actuator') according to an embodiment of the present invention, the housing 200 is largely fixed in the car seat, and in the housing 200 A pulley 300 rotatably mounted to wind the towing wire W, one end of which is coupled to one side of the housing 200, and the other end of the shaft 400 protrudes to the outside of the vehicle seat, and the pulley 300. A driving unit 600 which is integrally coupled to the shaft 400 through the shaft 400, a ratchet gear 700 which is installed to surround the driving unit 600, and enables a tilting rotation of the driving unit 600, and a pulley. A shaft 500 is coupled to the shaft 300 includes a hub 500 for rotating the pulley 300 in conjunction with the rotation of the ratchet gear 700, the pulley 300 is rotated by the rotation of the shaft 400 towing wire (W) will be wound up.

The housing 200 may be divided into a base housing 210 that is fixed by the bracket 450 inside the vehicle seat and a cover housing 220 that covers the base housing 210, and on one side of the base housing 210. Traction wire entrance 211 is formed so that the towing wire (W) is accessible, the base housing 210 and the cover housing 220 has a space (210a, 220a) inside. At this time, the reason why the traction wire entrance 211 is formed on both sides is to allow the actuator 100 to be installed at both sides of the car seat, to accommodate the flexibility of the car seat design.

4 and 5, the pulley 300, the hub 500, the ratchet gear 700, and the driving unit 600 are sequentially received in the space 210a of the base housing 210, where the pulleys are located. 300 is a disk shape having a predetermined thickness having a hollow (300a) is a winding groove 310 is formed so that the traction wire (W) can be wound along the circumference, the upper side is inserted into the hub 500 to be described later The part 320 is formed, and the lower side is formed with an annular protrusion 330 to be inserted and supported in the coupling hole 212 provided on the bottom surface of the base housing 210.

At this time, the insertion portion 320 is formed to protrude along the outer circumferential surface of the hollow 300a, the spline protrusion 321 is formed on the outer circumferential surface of the insertion portion 320 is a spline provided in the hollow 510 of the hub 500 to be described later The pulley 300 is rotated together when the hub 500 rotates.

In addition, one side of the pulley 300 is extended along a predetermined angle and is formed with an extension portion 340 having a locking groove 341. The end of the towing wire W is pulled by the locking groove 341. The wire W is maintained without being separated from the pulley 300.

On the other hand, the base housing 210 is fixed to the inside of the car seat by the bracket 450, the spline groove 410 of a predetermined depth at one side of the base housing 210, that is, the bottom of the base housing 210 based on FIG. One end of the shaft 400 having a) is coupled, and a lever (not shown) is integrally coupled to the other end of the shaft 400 that is exposed to the outside of the car seat so that the passenger rotates the lever to support the lumber supporter L. ) Will be activated.

The driving unit 600 is splined to the shaft 400 to rotate integrally with the shaft 400 when the shaft 400 rotates, and passes through the hollow 300a of the pulley 300 to allow the shaft ( A protrusion 610 having a spline protrusion 611 formed on an outer circumferential surface thereof is formed at a lower end thereof so as to be splined to the spline groove 410 of the 400, and a head 620 is expanded to have a disc shape at an upper end thereof.

Here, the support 621 is formed to protrude from the center of the head 620 to the upper side, spaced apart from the support 621 by a predetermined distance, the engaging projection 622 is provided with the engaging member 630 to be described later. The fan rotator 623 extends outward from the support part 621, and the end of the rotary part 623 is bent downward to form a locking step 623a.

At this time, the locking jaw 623a of the driving unit 600 is caught by one end of the return spring 800 to be described later. Therefore, the driving unit 600 is rotated by a predetermined angle and then returned to its original position by the elastic restoring force of the return spring 800 to be described later. You will be returned to.

One end of the locking member 630 is hinged to the coupling protrusion 622 of the driving unit 600, and the other end is elastically supported toward the ratchet gear 700 which will be described later, and the locking member 630 rotates the shaft 400. Accordingly, when the driving unit 600 rotates, the ratchet gear 700 to be described later is pushed in one direction to rotate the tilting, and the rotation of the shaft 400 is completed, thereby driving the driving unit 600 by the return spring 800 to be described later. When it rotates to its original position, the slide moves along the surface of the ratchet gear 700 to its original position.

To this end, as shown in Figure 6 and 7, the locking member 630 is composed of a pair of engaging pieces (631, 632) facing each other, each of the engaging pieces (631, 632) coupling end 622 It is hinged to, the plate spring 640 is interposed between the pair of engaging pieces (631,632) to elastically support the other end of each of the engaging pieces (631,632) to the outside.

In addition, teeth 631a and 632a are formed at the other ends of the engaging pieces 631 and 632 so as to be engaged with the ratchet gear 700 to be described later, and teeth 631a and 632a and the ratchet gear 700 of the engaging pieces 631 and 632. It is preferable that the engaging pieces 631 and 632 are formed stepwise in the longitudinal direction such that the teeth 720 of the teeth are positioned on the same plane.

In addition, the locking projections 631b and 632b protrude upward from the other ends of the locking pieces 631 and 632, and the locking protrusions 631b and 632b are formed on the bottom surface of the cover housing 220 as shown in FIG. 10. The slide moves along the stepped portion 221 convexly formed in an arc shape at a predetermined angle. Accordingly, only one locking piece of the pair of locking pieces 631 and 632 engages with the ratchet gear 700 to form the ratchet gear 700. Rotated. This will be described in detail later.

The ratchet gear 700 is installed outside the driving unit 600 to surround the driving unit 600, and the lower end of the ratchet gear 700 is supported on the upper side of the pulley 300.

Here, the ratchet gear 700 is a cylindrical shape having a hollow 710, the teeth 720 are formed at the upper end of the inner peripheral surface to be engaged with the teeth 631a, 632a of the locking member 630, a plurality of the lower end along the rim A round bar 740 having an incision groove 730 of the protrusion is formed, the round bar 740 is supported on the upper side of the pulley (300).

At this time, the number of the cutout groove 730 and the round 740 can be freely selected according to the design conditions, and as shown in Figure 8 in terms of cost and efficiency, it is preferable to form three each.

The return spring 800 is circularly installed on the outside of the ratchet gear 700 to surround the ratchet gear 700, and is seated in a seating groove 213 provided along the inner wall of the base housing 210, and the return spring ( Both ends of the 800 are spaced apart from each other by a predetermined distance so as to be caught on both sides of the locking step 623a of the driving unit 600, and the locking part 810 is formed to protrude outward.

On the other hand, the support jaw 214 protrudes upward at a predetermined angle on one side of the mounting groove 213, the engaging portion of the return spring 800 is initially supported on both sides of the support jaw 214.

That is, the locking jaw 623a of the driving unit 600 is positioned in the space between the two locking portions 810 in a state where the locking portion 810 of the return spring 800 is supported on both sides of the support jaw 214. When the 600 is rotated in one direction, the locking jaw 623a of the driving unit 600 rotates while pushing one locking portion 810 of the return spring 800, and at this time, the other locking portion 810 is a supporting jaw. 214 is supported by the elastic restoring force to the locking jaw (623a) to return the return spring 800 to its original position.

Hereinafter, the rotation of the ratchet gear 700 according to the rotation of the driving unit 600 will be described in more detail.

By rotating the shaft 400 according to the lever operation of the passenger, the driving unit 600 integrally coupled with the shaft 400 is rotated, and at this time, among the pair of locking pieces 631 and 632 of the locking member 630. One is engaged with the ratchet gear 700 to rotate the ratchet gear 700, the other is to slide along the step portion 221 formed on the bottom of the cover housing 220.

That is, as shown in FIG. 6 and FIG. 7, the pair of engaging pieces 631 and 632 are initially engaged with the ratchet gear 700. Here, for example, when the driving unit 600 rotates clockwise, the right side The teeth 631a of the first locking piece 631 of the teeth engage with the teeth 720 of the ratchet gear 700 to rotate the ratchet gear 700 in a clockwise direction, and the second locking piece 632 on the left side is The locking protrusion 632b is rotated inward while being pushed by the stepped portion 221 of the bottom surface of the cover housing 220 to be separated from the tooth 720 of the ratchet gear 700 to slide along the stepped portion 221.

At this time, one of the locking portions 810 of the return spring 800 is supported by the support jaw 214, while the locking jaw 623a of the driving unit 600 pushes the other locking portion 810 in the clockwise direction. It is rotated to thereby the elastic restoring force of the return spring 800 is applied to the locking step (623a) in the counterclockwise direction.

Subsequently, when the external force applied to the lever is removed, the driving unit 600 and the shaft 400 are rotated counterclockwise to return to their original positions by the elastic restoring force of the return spring 800. ), The locking projection 632b slides along the stepped portion 221 of the bottom surface of the cover housing 220, returns to its original position after being separated from the ratchet gear 700, and then ratchets the gear back by the leaf spring 640. The first locking piece 631 is engaged with the 700 and slides along the teeth of the ratchet gear 700 while elastically deforming the leaf spring 640 to be engaged with the ratchet gear 700 again.

On the other hand, the rotatable angle of the driving unit 600 is limited by the stepped protrusion 222 formed to protrude at a predetermined angle on the bottom of the cover housing 220, the stepped step 222 is formed in a circular arc shape of 180 ° angle in FIG. For example, when the driving unit 600 is rotated, one side of the rotating unit 623 is caught by the step 222 so that no further rotation is possible, thereby limiting the angle at which the driving unit 600 can be rotated at once. The limiting angle can be changed by changing the forming angle of the step 222 and the forming angle of the rotating part 623, and the forming angle of the step 222 and the rotating part 623 can be arbitrarily selected according to design conditions. to be.

The hub 500 is interposed between the head 620 and the pulley 300 of the driving unit 600. The hub 500 rotates the pulley 300 while rotating together with the ratchet gear 700 in accordance with the rotation of the ratchet gear 700. The hub 500 has a hollow 510 in the shape of a disc having a plurality of cam-shaped portions ( 520 is convex. At this time, the number of the cam-shaped portion 520 is freely selectable, but preferably three cam-shaped portions 520 are arranged at equal intervals as shown in FIG. 8 so as to correspond to the round jaw 740 of the ratchet gear 700. Is formed.

On the other hand, the hollow 510 of the hub 500 is provided with a spline groove 511 and the spline protrusion 321 provided in the insertion portion 320 of the pulley 300 is coupled to the spline groove 511, According to the rotation of the 500, the pulley 300 will be integrally rotated together with the hub 500, which will be described in detail later.

Ring 900 is installed on the outer side of the hub 500 to surround the hub 500, the ring 900 is both sides on the inner wall of the base housing 210 to be spaced a predetermined distance from the outer peripheral surface of the hub 500 Is combined.

That is, the coupling portion 910 is extended to the outside along a predetermined angle on both sides of the ring 900, and the coupling groove 215 corresponding to the coupling portion 910 is provided on the inner wall of the base housing 210. , The inner circumferential surface of the ring 900 is fixed to the inner wall of the base housing 210 on the same plane as the hub 500, and the inner circumferential surface of the ring 900 is larger than the outer circumferential surface diameter of the hub 500. Slide grooves 920 are formed at predetermined intervals between the outer peripheral surfaces of the 500.

When the ratchet gear 700 is rotated, the round jaw 740 of the ratchet gear 700 slides along the slide groove 920, and the roller 750 is disposed in the cut groove 730 between the round jaw 740. Is inserted into each installation, the number of rollers 750 is freely selectable according to the design conditions and can also be used in the ball-shaped roller, preferably using a cylindrical roller as shown in Figure 4 and 8, Three rollers 750 are inserted and installed so that the rigid rollers 752 are positioned on both sides of one elastic roller 751.

Hereinafter, the rotation of the hub 500 and the pulley 300 according to the rotation of the ratchet gear 700 will be described in detail.

As shown in FIG. 8, as the cam portion 520 is formed convexly on the outer circumferential surface of the hub 500, the slide grooves 920 between the cam portions 520 have narrower widths at both ends than in the middle. An elastic roller 751 and a rigid roller 752 are fitted into the slide groove 920, and the rollers 750 are installed to be inserted into the cutting groove 730 of the ratchet gear 700.

At this time, the rollers 750 are moved along the slide groove 920 by receiving a force in one direction by the round jaw 740 of the ratchet gear 700 when the ratchet gear 700 is rotated, the rollers 750 ring Since the ring 900 is fixed to the base housing 210 in a state in which the inner circumferential surface of the 900 and the outer circumferential surface of the pulley 300 are pressed and supported, due to the friction force generated between the roller 750 and the pulley 300, When the roller 750 moves along the slide groove 920, the pulley 300 is rotated together.

In this case, if the tolerance between the roller 750 and the slide groove 920 is too small, the roller 750 is fixed to the slide groove 920 and cannot be moved. If the tolerance is too large, the pulley 300 is fixed. Only the rollers 750 are idle along the slide groove 920.

In addition, the elastic roller 751 supports both rigid rollers 752 in the direction of the narrow cam-shaped portion 520 to prevent unexpected reverse rotation of the hub 500 when the external force is removed. Do it.

On the other hand, if the pulley 300 is to continue to rotate to allow the winding wire (W) to be wound, the pull wire 300 is rotated because the pull wire (W) or the lumber supporter (L) may be damaged by excessive tensile force It is necessary to limit the possible angles.

To this end, a stopper 216 protrudes from one side of the inner side wall of the base housing 210. As shown in FIG. 9, the stopper 216 protrudes at an angle along the inner side wall of the base housing 210. One side of the expansion unit 340 is caught by the stopper 216 during rotation, thereby preventing further rotation.

At this time, the rotatable angle of the pulley 300 is determined by the angle of formation of the expansion unit 340 and the stopper 216 of the pulley 300, of course, the user can freely select according to the design conditions.

That is, the actuator 100 according to an embodiment of the present invention, the user rotates the lever exposed to one side of the car seat to operate the lumber supporter (L), the shaft 400 and the drive unit by the rotation of the lever (600) rotates, the ratchet gear 700 is rotated by the locking member 630 of the drive unit 600, the round jaw 740 of the ratchet gear 700 pushes the roller 750 to the hub 500 Rotating, the pulley 300 is spline coupled to the hub 500 is to rotate the towing wire (W) on the outer peripheral surface of the pulley (300).

At this time, the loosening of the traction wire (W) is made by rotating the lever in the reverse direction, the shaft 400, the drive unit 600, the ratchet gear 700, the roller 750, the hub 500 and the pulley 300 ) Will rotate in the reverse direction.

1 is a schematic diagram showing the structure of a conventional lumber supporter.

Figure 2 is a schematic diagram showing a state in which the lumber support actuator is connected to the lumber supporter according to an embodiment of the present invention.

Figure 3 is a perspective view of the lumber supporter actuator according to an embodiment of the present invention.

4 is an exploded perspective view of FIG. 3;

5 is a cross-sectional view of FIG. 3.

6 is a perspective view showing a state in which the cover housing is removed in FIG.

7 is a plan view of FIG.

FIG. 8 is a plan view illustrating a driving unit and a ratchet gear removed from FIG. 7; FIG.

9 is a perspective view of a base housing according to an embodiment of the present invention.

10 is a perspective view of a cover housing according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

L: Lumber Supporter W: Traction Wire

100: Lumber support actuator

200 housing 210 base housing

220: cover housing 300: pulley

400: shaft 450: bracket

500: hub 600: drive unit

610: protrusion 620: head

630: locking member 631: first locking piece

632: second jam 640: leaf spring

700: Ratchet Gear 720: Teeth

730: incision groove 740: round jaw

750: roller 800: return spring

900: ring

Claims (10)

A base housing having a space portion therein and having a towing wire entrance and exit at one side thereof to communicate with the space portion, the base housing being fixed inside the vehicle seat; A cover housing covering the base housing; A pulley rotatably mounted to a space portion of the base housing, and having an upper portion formed therein with an insertion portion having a spline protrusion on an outer circumferential surface thereof; A shaft having one end coupled to the lower side of the base housing and the other end protruding out of the vehicle seat; A driving unit penetratingly coupled to the shaft and integrally connected to the shaft; A ratchet gear installed on an outer side of the driving unit to surround the driving unit and engaged with a locking member installed on one side of the driving unit; And And a hub which rotates in association with the rotation of the ratchet gear, and a spline groove corresponding to the spline protrusion is formed on an inner circumferential surface thereof and coupled to the insertion unit. The driving unit includes: Protruding portion which is integrally coupled to the shaft through the pulley is formed at the lower end, the head is extended at the upper end, the support is formed protruding in the center of the head, the engaging member is coupled to one side of the support A coupling protrusion is provided, and a fan-shaped rotation part is formed to extend outward from the support part, and the locking step is formed at the end of the rotation part by bending downward. A lumber support actuator, wherein the pulley is rotated by the rotation of the shaft to wind a traction wire. The method according to claim 1, A lumber supporter actuator, characterized in that a stopper protrudes from one side of the inner side of the base housing so that the pulley does not rotate more than a predetermined angle. delete The method according to claim 1, Lumber support actuator, characterized in that the stepped protruding on the bottom surface of the cover housing so that the rotating portion does not rotate more than a predetermined angle. The method according to claim 1, The locking member, Comprising a pair of engaging pieces facing each other, the engaging piece is hinged to one end of the engaging projection and the other end is elastically supported to the outside, one of the pair of engaging pieces are selectively engaged with the ratchet gear Lumber supporter actuator, characterized in that. A base housing having a space portion therein and having a towing wire entrance and exit at one side thereof to communicate with the space portion, the base housing being fixed inside the vehicle seat; A cover housing covering the base housing; A pulley rotatably mounted to a space portion of the base housing, and having an upper portion formed therein with an insertion portion having a spline protrusion on an outer circumferential surface thereof; A shaft having one end coupled to the lower side of the base housing and the other end protruding out of the vehicle seat; A driving unit penetratingly coupled to the shaft and integrally connected to the shaft; The ratchet is installed on the outside of the driving unit to surround the driving unit, the tooth is formed on the upper end of the inner circumferential surface to be engaged with the engaging member installed on one side of the driving unit, the lower end of the ratchet with a plurality of incision grooves formed along the rim Gear; And And a hub coupled to the rotation of the ratchet gear, and having a spline groove corresponding to the spline protrusion formed on an inner circumferential surface thereof and coupled to the insertion unit, wherein the pulley is rotated by the rotation of the shaft. Lumber supporter actuator to wind up. The method according to claim 6, Further comprising a ring fixed to one side of the space portion of the housing to surround the hub, a plurality of cam-shaped portion is formed convexly on the outer peripheral surface of the hub, the plurality of rollers in the cutting groove each of the inner peripheral surface and the ring Lumber support actuator is inserted into the outer circumferential surface of the hub, the hub is rotated integrally with the ratchet gear by the rotation of the ratchet gear. The method of claim 7, The lumber support actuator, characterized in that the stiffening roller is installed in each of the two elastic rollers in the cutting groove. The method according to claim 1, It is installed in a circular shape on the outer side of the ratchet gear to surround the ratchet gear, both ends of the engaging portion is formed to be projected to be caught on both sides of the locking jaw of the drive unit, the return spring for elastically supporting the rotation unit in one direction when the drive unit is rotated The lumber supporter actuator which is further included. The method according to claim 9, A seating groove in which the return spring is seated is formed along an inner wall of the base housing, and a support jaw protrudes from one side of the seating recess, and the engaging portions of the return spring are supported at both sides of the support jaw, respectively. Lumber support actuator.

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